Accessible Parking Markings: The Property Owner's Guide

Accessible parking markings are one of the most common compliance gaps we find during lot assessments. This guide covers the requirements for accessible parking stalls, access aisles, signage, and markings based on the 2010 ADA Standards for Accessible Design. It is written for property owners and managers who want to understand what the rules are and what to look for. It is educational, not legal advice.

Overview and scope of this guide

The Americans with Disabilities Act (ADA) sets federal accessibility standards for places of public accommodation. The 2010 ADA Standards for Accessible Design is the current federal document that specifies how accessible parking must be designed, marked, and signed. State and local codes may impose additional requirements.

This guide focuses on the pavement-related aspects of accessible parking: how many spaces are needed, how wide they must be, what markings are required, what signage must be posted, and where the spaces should be located. It does not cover building accessibility, restroom accessibility, or path-of-travel requirements beyond the parking area itself.

How many accessible spaces are required

The 2010 ADA Standards specify the minimum number of accessible parking spaces based on the total number of parking spaces in the lot. Here is the table from the standards:

Out of every six (or fraction of six) accessible spaces, at least one must be van-accessible. For example, if a lot requires four accessible spaces, at least one must be van-accessible.

Dimensions and access aisles

Accessible parking spaces must meet specific dimensional requirements under the 2010 ADA Standards:

• Car-accessible spaces: At least 96 inches (8 feet) wide.
• Van-accessible spaces: At least 132 inches (11 feet) wide, OR 96 inches wide with a 96-inch-wide access aisle.
• Access aisles: At least 60 inches (5 feet) wide. They must be the full length of the parking space and connect to an accessible route.
• Access aisle sharing: Two accessible spaces may share a single access aisle. For example, two 96-inch-wide car spaces flanking a 60-inch aisle is a common compliant configuration.
• Vertical clearance: Van-accessible spaces need at least 98 inches of vertical clearance for a vehicle lift. This matters for parking garages and under-building parking.

Signage requirements

Marking the pavement is not enough. Accessible parking spaces must also have proper signage:

• Sign type: A sign displaying the international symbol of accessibility (the wheelchair symbol).
• Mounting height: The sign must be at least 60 inches above the ground (measured to the bottom of the sign) so it is visible when a vehicle is parked in the space.
• Van-accessible signage: Van-accessible spaces must have an additional sign reading "van accessible."
• Location: Signs should be located so they are not obscured by a vehicle parked in the space.

Surface markings

While the ADA Standards do not mandate a specific color for accessible parking markings, they do require that the spaces and access aisles be clearly marked. Common practices include:

• Striping: Standard 4-inch-wide white or yellow lines defining the space boundaries and the access aisle.
• Access aisle markings: The access aisle should be marked to discourage parking in it. Diagonal striping (crosshatching) is the standard treatment. Some jurisdictions require blue striping with the wheelchair symbol painted in the aisle.
• Symbol: The international symbol of accessibility may be painted on the pavement surface inside the space, though the sign is the legally required identifier.

Local codes may impose additional marking requirements, such as blue paint in the access aisle. Always check with your local jurisdiction for any supplemental requirements.

Slope and surface requirements

Accessible parking spaces and access aisles must have a surface that is stable, firm, and slip-resistant. Slope requirements include:

• Slope: The slope of accessible parking spaces and access aisles must not exceed 1:48 (approximately 2 percent) in any direction.
• Surface condition: The surface must be maintained in good condition. Potholes, cracks, and surface failures in accessible spaces are accessibility barriers, not just pavement problems.
• Drainage: Water must not accumulate in or around accessible spaces. Standing water in an access aisle is a barrier.

Where spaces should be located

Accessible parking spaces must be located on the shortest accessible route to an accessible building entrance. Requirements include:

• Proximity: Spaces should be as close as possible to the building entrance they serve.
• Accessible route: There must be a continuous, unobstructed path from the access aisle to the building entrance that meets accessibility standards for width, slope, and surface.
• Curb ramps: If the route crosses a curb, a curb ramp must be provided.
• No obstacles: The route cannot pass through vehicular traffic areas without a marked crossing.

Van-accessible spaces

Van-accessible spaces are designed to accommodate wheelchair lifts or ramps deployed from the side of a van. They differ from car-accessible spaces in width and signage:

• Either 132 inches wide with a standard 60-inch access aisle, or 96 inches wide with a 96-inch access aisle
• At least 98 inches of vertical clearance for the lift
• Must have a "van accessible" sign in addition to the wheelchair symbol sign

Out of every six accessible spaces required, at least one must be van-accessible.

What ADA striping and signage costs

These are budgetary ranges for Middle Tennessee. A full ADA upgrade for a small lot (one or two accessible spaces with signs, striping, and crosshatching) typically runs $300 to $800. Larger lots with multiple spaces cost proportionally more.

What striping can and cannot fix

• Slope problems. If the grade exceeds 2 percent, the space is non-compliant. Only regrading can fix this.
• Missing accessible route. If there is no accessible path from the parking space to the building entrance, the space is non-compliant regardless of the paint.
• Incorrect dimensions. If the space or access aisle was built too narrow, repainting it the same way does not make it compliant. The layout must be redesigned.
• Structural surface failures. Potholes and broken pavement in accessible spaces are accessibility barriers that must be repaired, not painted over.

A fresh stripe job on a lot with slope, route, or dimension problems creates the appearance of compliance without the substance. An honest contractor will tell you when the paint is not enough.

Common ADA parking mistakes

• Missing or incorrect signs. The most common finding. Paint fades, but a missing sign is an immediate compliance gap.
• Access aisle too narrow. A 60-inch minimum is required. Many older lots have 36-inch or 48-inch aisles.
• Allowing parking in the access aisle. The aisle must be kept clear. Crosshatching discourages this, but enforcement is also needed.
• Wrong number of spaces. Lots are often built correctly but altered later, adding or removing spaces without updating the accessible count.
• No van-accessible space. Required when there are one to six accessible spaces. Often overlooked on small lots.
• Slope exceeds 2 percent. Common on lots built before current standards. Striping does not fix this.
• Signs too low. Signs must be at least 60 inches above the ground to be visible when a vehicle is parked in the space.

Important disclaimer

For more on the broader topic of parking lot striping, see our complete guide to parking lot striping.